* The stack pretty prints function arguments, you don't necessarily have to visit each level and check its locals

* Firebug hyperlinks objects and functions to (respectively) the object inspection tab and their source location

The WDT's timeline is not very useful in my opinion, the "network tab"'s overview on the other hand is great for understanding how resources are loaded and affect each other (or what the xhr sequences are when you seem to have a bug there)